摘要
研究了有效铅、镉与玉米根、茎、叶的吸收相关性，及有效镉与水稻生长发育和产量的相关性，通过玉米根、茎、叶的伤流、蒸腾等试验，探讨了玉米对铅、镉的吸收和运输机制。水稻体内对镉的积累与分布规律为根＞茎叶＞籽粒，当镉质量比为３２ｍｇ／ｋｇ时，水稻糙米里镉质量比超标，测出了褐土有效镉临界质量比：水稻为５９４ｍｇ／ｋｇ。
The absorptive relevance between available PbCd and the root,stem,leaf of maize,and the relevance between available Cd and the growth,yield of rice are studied in this paperThrough the experiment of transpiration,bleeding,osmosis of the root,stem,leaf of maize,the absorptive and transportation mechanism of maize on PbCd are studied within the body of riceThe regulation of accumulation and distribution of Cd is root > stem, leaf>seed,when Cd Concentration is 32 mg/kg,Cd concentration in brown rice surpass the standard and the critical concentration of Cd in drab soil is 594 mg/kg in rice
出处
《河北农业大学学报》
CAS
CSCD
北大核心
1999年第1期24-28,共5页
Journal of Hebei Agricultural University
基金
河北省自然科学基金
关键词
褐土
铅
镉
玉米
水稻
有效态
土壤
Drab soil
Lead
Cadmium
Maize
Rice
Availability
